Question

Are ribosomes membrane-bound?

Answer 1

Ribosomes

1. Ribosomes are non-membrane bound particles present in a large number inside cells.
2. They are the significant sites of protein synthesis.
3. A ribosome is a complex of RNA and protein and is, therefore, known as a ribonucleoprotein.
4. The smaller subunit is where the mRNA binds and is decoded, and in the larger subunit, the amino acids get added.
5. Ribosomes can be present attached to the endoplasmic reticulum or freely suspended in the cytosol.
6. All prokaryotes have 70S ribosomes whereas eukaryotes in their cytosol contain larger 80S ribosomes.
7. They are present in both prokaryotes and eukaryotes.
8. The 70S ribosome consists of subunits 50S and 30S, whereas the 80S ribosomes are made of subunits 60S and 40S.
9. In catalyzing two biological processes, ribosomes play a key role in the transfer of peptidyl bonds during protein formation and hydrolysis of peptidyl bond during the protein release.